420206231 has 8 divisors (see below), whose sum is σ = 424982880. Its totient is φ = 415438848.

The previous prime is 420206219. The next prime is 420206233. The reversal of 420206231 is 132602024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420206231 - 2⁶ = 420206167 is a prime.

It is a super-2 number, since 2×420206231² = 353146553142450722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420206233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131015 + ... + 134183.

It is an arithmetic number, because the mean of its divisors is an integer number (53122860).

Almost surely, 2^420206231 is an apocalyptic number.

420206231 is a deficient number, since it is larger than the sum of its proper divisors (4776649).

420206231 is a wasteful number, since it uses less digits than its factorization.

420206231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 420206231 is about 20498.9324356172. The cubic root of 420206231 is about 749.0097930809.

Adding to 420206231 its reverse (132602024), we get a palindrome (552808255).

The spelling of 420206231 in words is "four hundred twenty million, two hundred six thousand, two hundred thirty-one".